Home / 90,420.37-135,656.94-40,488.78

Finding the Fourth Proportional to 90,420.37, 135,656.94 and 40,488.78

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Solution

The fourth proportional to 90,420.37, 135,656.94 and 40,488.78 is: 60,744.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,420.37 : 135,656.94 = 40,488.78 : x
  2. Step 2: Convert to fraction form
    90,420.37/135,656.94 = 40,488.78/x
  3. Step 3: Cross multiply
    90,420.37x = 135,656.94 × 40,488.78
  4. Step 4: Simplify right side
    90,420.37x = 5,492,583,999.13
  5. Step 5: Solve for x
    x = 5,492,583,999.13/90,420.37
  6. Step 6: Final answer
    x = 60,744.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.